I'm going to order one of these and give it a try, what sort of temp window are you able to maintain with it? I'm probably going to build it with the intent of using it on a rack running 11" flex underneath vision boa tubs. I have a self built dimmer I'll run in line with it as well, but will probably test it for awhile without the dimmer to see what variances I get.-----Reptiles Make The World Go Round.